Monitor stand riser



FIG. 1 is a top, front and left side perspective view of a monitor stand riser showing my new design;

FIG. 2 is a bottom, rear and right side perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a front elevation side view thereof;

FIG. 6 is a rear elevation side view thereof;

FIG. 7 is a left side elevation view thereof; and,

FIG. 8 is a right side elevation view thereof.

The broken lines shown in FIGS. 2 and 4-8 illustrate portions of the monitor stand riser that form no part of the claimed design. 

CLAIM The ornamental design for a monitor stand riser, as shown and described. 